Physics N Math

Question 1

Difference between scientific and engineering notation

Answer 1

Scientific base 1 to 10 exponent also base 10 ie 5 × 10^25
Eng base 1 to 1000 exponent base 10 BUT exponent multiple of 3
976 × 10^6

Question 2

Easiest way to divide a fraction?

Answer 2

Cross multiply(keep, switch, flip)
- keep 1st fraction
- switch to multiply
- flip 2nd fraction

Question 3

2/5 + 3/7

Answer 3

29/35

Question 4

2/3 × 15/16 =

Answer 4

30/48 (5/8)

Question 5

Is 3:2 equivalent to 7069:4712?

Answer 5

3/2 = 1.5
7069/4712 =1.5002
So yes

Question 6

% change =

Answer 6

(Final amount- initial amount/initial amount ) ×100

Question 7

A (math) term is:

Answer 7

Any variable you separate with a +,-,or = sign

Question 8

A factor(math ) is

Answer 8

Any variable you separate with a × or ÷
Can be implied like 4ab.
The 4 a and b are all factors

Question 9

Number that describes growth?
How is it set up in the calc?

Answer 9

2.71828
E^x

Question 10

At 360 degrees (circle) how many radians

Answer 10

2 pi

Question 11

At 180 degrees( circle) how many radians

Answer 11

1 pi

Question 12

If 2 angles add upto 180 they are?
90 they are?

Answer 12

180 = supplementary
90 = complimentary

Question 13

X= sin 25.3 degrees
Side length 15
Find x

Answer 13

15
Sin
25.3
X = 6.41036

Question 14

Cos A = .8346
Find A

Answer 14

2nd + cos (0.8346)
A = 33.4257

Question 15

If a full tank is .5m high, liquid density is 998.2 and gravity is 9.81
What is the kpa?

Answer 15

4.896

Question 16

Def hydrostatic pressure

Answer 16

Pressure developed by a column of liquid

Question 17

Newtons 1st law

Answer 17

Object in motion stays in motion and object at rest stays at rest till acted on by an equal or greater force

Question 18

Newtons 2nd law

Answer 18

The more mass the less accelerate, the harder you push the more accelerates

Question 19

Newtons 3rd law

Answer 19

For every action there is an equal and opposite reaction

Question 20

Distance def:
Symbol

Answer 20

The total length of the path an object follows
d

Question 21

• Displacement def:
• Symbol?

Answer 21

The straight line distance and direction from an objects starting point to its final position
d with line over

Question 22

V = d/t stands for

Answer 22

Average speed
Distance = speed / time
Average velocity
Displacement = velocity/time

Question 23

A = Vf - Vo / t stands for

Answer 23

A = acceleration
Vf = final velocity
Vo = initial velocity
T = time

Question 24

Velocity is speeding up if

Answer 24

A = + and v = +
Or
A = - and v = -

Question 25

g =
Sooo

Answer 25

-9.8 m/s^2
So always - on velocity

Question 26

Tension def:

Answer 26

Force through a “rope”

Question 27

V = VoT + .5 at^2 is for

Answer 27

Velocity as a unit of time

Question 28

V = Vo + at is for

Answer 28

How far have I gone in a straight line as a unit of time?

Question 29

V^2 = Vo^2 + 2ax is for

Answer 29

Velocity as a function of distance

Question 30

3 1lb (1 inch ^2) boxes staked on top of each other
Force?
Pressure?

Answer 30

F = 3lbf
P = 3lbf/in^2

Question 31

3 1 lb (1 inch ^2)boxes side by side
Force?
Pressure?

Answer 31

F = 3 life
P = 1 lbf/in^2